Band-saw guide-disk



E. N EWELL.

BAND SAW GUIDE DISK.

APPLICATION FILED SEPT. 26, 1919.

Patenteu Nov. 30

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. v "fBAND- SAW enrniis x Specification of IiettersPate nt. a d NOV. 30 1920.

' Original application filed August 8,1918, SerialNo. 248,975; Divided and this application filed September a 26,1919; Seria1' N0.- 326,476. I

T0 aZZ wiwmc't may concern. w

Be it known that I, EDGAR NnwnLL, a'citizen of the United States, and'a resident or Irwin, in the county of \Vestmoreland and State of Pennsylvania, have made a new and useful Invention in Band-Saw Guide- Disks, of which the following is a specification. I

My invention relates to band saw guides and this application covers particular teatures of the saw guide described in my copending application, Serial No; 248,973. This invention comprises a wheel or disk and the mounting for same adapted to offer a bearing for the back of a band saw during the latters passage through a guide of the type shown in the above mentioned application.

The objects of my invention. are to mount a bearing disk so as to utilize commercial ball bearing sets, to provide a disk that is reversible and that may be easily reversed or replaced and to eliminate friction by distributing the pressure of the sawblade to the ball bearings so as to prevent binding or undue strain. I also desire to provide a lubricant chamber and passage for the ball bearings and to exclude dirt from the same.

guide device is provided with an opening. for the bearing disk spindle 2 whlch 1s adjustable longitudinally in the opening and may be secured in any position by a thumb-' screw 3. Near the outer end of spindle 2 is a circumferential shoulder 4 and beyond.

this the spindle is turned down to snugly fit the interior of the inner race 5 of a commercial ball bearing set. I have shown a single row ball bearing of common typebut obviously other similar types may be similarly used. The outer end of spindle 2 is swaged to form a retaining shoulder 6 corresponding to shoulder .4.

The saw bearing is a ring shaped disk having a comparatively heavy rim 7 and a thin plate 8 having round hole which fits I closely over the outer circumference of the external race 9 of the ballbea'ring. I do not rely upon this fit to maintain the assemblyfof the disk and bearing but rather upon the cooperating actionof the sheet PATENT FF CE f metal covers 10 and 11 which are bolted to I the diskplate and each other near their circumferential edges. Each cover has an off-' setportion 12 which grips outer race 9 when bolts 13 are tightened.

Covers 1.0 and 11 besides holding the disk I in position, form protecting shields for ball bearings 14 between races 5 and 9. The end of spindle2 is recessed at 15 to provide a lubricant receptacle and this receptacle or pocket, while open to thebearings,'is closed to theatmosphere by outer cover 10. The metal covers surround the balls and their races except where cover 11 is pierced to admit spindle At this point'a strip 16 of packing material is preferably inserted which completes the dust tight, lubricant retaining incl osure, enabling the bearing to Operatewithout difiiculty in the unfavorable atmosphere abouta band saw.

The band saw for which the disk forms a bearing is indicated at 17 and it will be noted that any pressure exerted onrim 7 by the saw blade istransmitted by covers 10 and 11 to race 9. Vhen the rim 7 is worn on the saw supporting side, bolts 13 and cover 10 may be removed and thedisk reversed or a new disk may be applied to the same set of bearings,- when cover 10 may be replaced and bolted to cover 11.

1 My device is compact, economical and efrotating outer race and1a1iti-friction elenents between said races, and a reversible member detachably secured to said outer race, provided with oppositely facing sur ficient. It is adapted to utilize any standard ball bearing set without special races or i faces each adapted to form a bearing for T the blade of a band saw.

and including a freely rotating race mem- 3. In combination, a spindle, a standard ball bearing set including an inner race mounted onsaid spindle, an outer race and balls retained by said races, and a tool supporting element having a centripetal flange and which is detachably secured to said outer race by cooperating members which grip said outer race and said flange between them.

a. In a thrust support for a band saw, a saw supporting annulus, a spindle having a lubricant holding recess in its end, a standard, ball bearing set including an inner race mounted upon the periphery of said spindle adjacent said recessed end and a rounding the periphery of said'spindle and s covering the opposite face of said set, each of said members maintaining a peripheral contact with said outer race and both cooperating to mount said annulus upon said outer race.

1 In testimony whereof I have hereunto subscribed my hand this 19th day of September, 1919. r I

EDGAR NEWELL. 

